CASTELLI A/C CYCLING CAPWearing a cycling cap has numerous benefits like helping to keep sweat and rain out of your eyes and being able to protect your eyes from the sun. Some hats can even help keep your head warm when it's cold, or cool when it's warm thanks to its sweat-wicking properties. The A/C Cycling Cap by Castelli is a highly ventilated mesh cap. It is lightweight at only 40 grams, and one size will fit all heads.FeaturesHighly ventilated mesh keeps your head cool when it's warmOne size fits allLightweight at only 40 grams | Castelli A/C Cycling Cap Men's in White